My '71-'74 B-body 1 1/4" offset spring hanger/shackle kit works nicely with a '68-'70 B-body rearend, 10" wheels with 5" of backspacing and MT Sportsman S/R 28/12/15 or Hoosier 29/12.50/15 Pro-street radials.

If the springs are not moved inward, the housing ends interfere with the U-bolts.